Trinity.
Mary not a regular person
Saints only being “special people”
There are other areas, but these are very cut and dry from what is in the Bible.
I know their are pages if not volumes to justify these changes, but I don’t but it.
Catholic Doctrinal Concordance
Contents God, One and True God’s nature, Trinity, and Jesus
God’s Creatures Mary, Man, Angels, Saints, and the devil
God’s Remedies Grace, The Church, Scripture, and Sacraments
God’s Gifts Faith, Hope, Love, and Prayer
The Last Things Death, Purgatory, Heaven, and Hell
Additional Topics Apologetics, and topics of dispute with other Christians
Links Great Catholic links
infpage.com/concordance/
Welcome to EarlyChurchFathers
earlychurchfathers.org/
Faith of the Early Fathers, v I, II, and III
By William A. Jurgens.
In this three-volume set the early church fathers speak for themselves. Volume I covers the Pre-Nicene and Nicene eras; Volume II covers the Post-Nicene era through St. Jerome; and Volume III covers St. Augustine to the end of the patristic period
Faith of the Early Fathers
amazon.com/Faith-Early-Fathers-Vol-1/dp/0814604323